Improvement in fuel-burners



G. s. BOSWORTH.

Fuel-Burner.

Patented Se pt W/TNESSES.'

/N VEN TUR.' M

N:PETERS. PMOYO-LITHOGWIPHFH WASMINGTUNA D C- UNITED STATES PATENT OEEIGE.

GEORGES. BOSWORTH, OF TROY, NEW YORK.

IMPROVEMENT IN FUEL-BURNERS.

Specification forming part of Letters Patent No. 208,221, dated September 24, 1878; application iiled March 22, 1878. v

To all whom t may concern:

Be it known that I, GEORGE S. BoswoRTE, of the city of Troy, in the county of Rensselaer and State of New York, have invented certain new and useful Improvements in Fuel-Burners, of which the following is a specification,

reference being had to the accompanying drawing.

The general object of this invention is to produce a cheap, compact, and durable burner, y by which ignited bituminous coal and similar parts below the lines y y in Fig. 2, and Fig. 5,

a horizontal section at and plan of parts below the plane z z--all of a fuel-burner inwhicli my present invention is embodied. Figs. 6, 7, and 8 are vertical sections of burners, showing modied parts of the same invention.

A is a fire-chamber, covered by a top casing, b, and having in its bottom or lower part a tubular grate, C, adapted to support solid fuel, t, in the fire-chamber.

The tubes of the grate are open at their ends, and have communication at one end, d, with a supply of air, and at the oth er end, e, through a conduit, F, with the upper part of the covered lire-chamber.

G is a flue or passage leading from the under side of the grate C, to conduct off the gaseous products of combustion.

I thus combine the covered lire-chamber A, tubular fuel-supporting grate C, conduit F, and exit-passage Gr, in order that, while air shall be caused to pass through the tubes of the grate O, and thence into the upper part of the rechamber, to support the combustion of the ignited fuel therein, the hot and burning gases from the fuel shall at the same time be compelled to pass from the covered fire-chamber downward through the spaces between' the tubes of the grate., and thereby more highly heat the air which passes through the tubes of the grate, and thence into the upper por tion of the fire-chamber. I thus secure a more quick, intense, or complete combustion of the fuel than if air were passed through the tubes of the grate, and thence into the upper part of the lire-chamber, andthe gases of combustion were not compelled to pass downward through the spaces between the tubes of the grate, but were conducted oft' above the latter, or than if the gases of combustion were passed down through the spaces between the-tubes of the grate, and air passed through the grate were not thence conducted into the upper portion of the nre-chamber.

In connection with the above-described combination of the covered nre-chamber A, tubular grate C, conduit F, and exit-passage G, I commonly prefer to make an aperture or apertures, h, from the conduit .F into the eXitpas sage G, and furnish the same with a damper, t', whereby a portion of the air that shall have passed through and been heated by the tubes of the grate can be admitted in regulated quantity into the exit-passage ,.G, so as to thereby assist the combustion ytherein of the gases that shall have passed from the firechamber downward throughthe spaces be tween the tubes of the grate, and also, at the same time, lessen and regulate the quantity of air passing from within the tubes of the grate into the upper part of the fire-chamber Awithout obstructing or lessening the admis sion and passage of the air into and through the tubes of the grate.

In connection with the covered fire-chamber A, tubular gra-te C, air-conduit F and exitflue G, combined as above described, I sometimes prefer to have a portion,- j, of the exitflue Gr extend along the casing k of the conduit F, so as to thereby increase the heat of the air L along the casing of the fire-chamber, so as to regulate the heat of the latter and of such admitted air, and thence into the upper part of the fire-chamber to assist combustion therein, and to lessen and regulate the draft and quantity of air passing through the tubes of the grate, and thence into the upper portion of the 'covered rire-chamber, without obstructing the entrance of the air into or its passage through or from the tubes of the grate.

I sometimes prefer to combine, with the covered fire-chamber A, tubular grate C, conduit F, and exit-passage G, the dampered aperture or apertures h i, and also the air-heating flue L, having the inlet and outlet apertures n p and damper o, so that while air shall freely pass through the tubes of the grate, and thence into the upper part of the flrechamber, above the fuel therein, and thence, with the gases evolved from the burning fuel, downward through the spaces between the tubes of the grate into the exit-flue G, air, in regulated quantities, can at the same time be made to pass through the heating-flue L, and thence either wholly into the upper part of the rechamber, or partly into the latter and partly through the dampered apertures h fi, in regulated quantity, into the flue G, to assist the combustion of unconsumed gases therein, lessen the downward draft through the fuel in the fire-chamber, and vary the draft of air through the tubes of the grate without obstructing the latter, as shall be desirable in using the burner in consuming various kinds of coal or fuel and in regulating the combustion of the fuel and volatile and gaseous inatters evolved therefrom.

In carrying out this invention a damper can be applied to the inlet or outlet of the tubular grate, so as to thereby regulate and controlthe passage of the airtherethrough, and thence into the upper part of the covered fire chamber. I generally prefer, however, to not have any such damper, and thus insure the passage of air through the tubes of the grate, so as to avoid all liability of having the tubular grate quickly destroyed by the great heat communicated thereto by the ignited gases passing downward through the spaces between the tubes of the grate.

What I claim as my invention isl. The combination of the lire-chamber A, tubular fuel-supporting grate C, conduit F, and exit-passage G under the grate, whereby air is caused to pass through the tubes of the grate, thence into the upper part of the firechamber, and thence with the burning gases downward through the ignited fuel and spaces between the tubes of the grate into the exit-- passage under the grate, substantially as set forth.

2. The combination of the re-chamber A, tubular grate C, conduit F, flue G, and dampered passage h fi, substantially as described.

3. The combination of the fire-chamber A, tubular grate C, air-conduit F, and iiue G, leading from the under side of the grate, and having a part, j, along the casing 7c of the said air-conduit, as set forth.

4. The combination of the fire-chamber A, tubular grate C, conduit F, exit-flue G, and air-heating iiue L, having inlet and outlet passages 'n p and damper o, substantially as described.

5. The combination of the tire-chamber A, tubular grate C, conduit F, exit-flue G, dampered passage h i, and air-heating flue L, having inlet and outlet passages n p and damper o, substantially as set forth.

In testimony whereof I hereunto set my hand in the presence of two subscribing witnesses this 16th day of March, 187.8.

. GEORGE S. BOSWORTH. lVitnesses JAMES H. SLADE. W. PRFONTAINE. 

